Smokeless combustion-furnace.



No. '785,689. PATENTED MA'R.21,1905.' 0. WEGENER.

SMOKELESS COMBUSTION FURNACE. IAPPLIOATION 11.31) 00130, 1902.

-by means of any suitable device.

UNITED STATES Patented March 21, 1905.

PATENT OEEIoE.

SMOKELESS COMBUSTION-FURNACE.

SPECIFICATION forming part of Letters Patent No. 785,689, dated March21, 1905.

Original application filed October 17,1900, Serial No. 33,389. Dividedand this application filed October 30,1902. Serial No. 129,358.

To all whom it may concern:

Be it known that I, CARL WEGENER, a subject of the King of Prussia,Emperor of Germany, residing at No. 1 Gitschinerstrasse, Berlin,Prussia, German Empire, have invented new and useful Improvements in andin Connection with Smokeless Combustion- Furnaces, of which thefollowing is a specification.

My invention relates to improvements in and connected with that class offurnaces in which the fresh fuel is fed in known manner from underneathbelow the layer of live fuel.

The invention consists more especially in the arrangement of the furnacein such manner that the sole of the combustion-chamber is formed by afireproof step-grate placed upon the feed-pipe, the said grateconsisting of a number of separate rings with a removable disk arrangedunderneath the same.

In the accompanying drawing I have shown in vertical section a smokelesscombustion-furnace constructed according to my invention.

The furnace consists of the combustionchamber 1, which may have anyoptional dimensions. The sole of the combustion-chamber is formed by afireproof step-grate 37, consisting of a number of separate rings 36 andmounted on the pipe 6 for feeding the fuel into the combustion-chamber,and by an annular plate 38, movable, for instance, on rollers. The flue2 for drawing off the generated firegases is in this construction at thetop and lat erally arranged. For the purpose of conducting away theclinker and ash the annular plate 38 preferably slopes downwardly towardits outer edge and is kept in continuous motion Openings 43 may bealsoprovided in the wall of the flue 2 for the purpose of introducing airinto this channel and to convert the oxid of carbon into carbonic acid.

In this system of firing the draft from the chimney, as also the supplyof air which is in-. troduced through a door 35 under the grate andwhich passes through the spaces between the rings of the grate, issufiicient to maintain the combustion.

The above-described furnace is operated as follows: The fuel is from thehopper 11 introduced into the combustion-chamber 1 from below by meansof any suitable feed device for instance, by the piston 10-thr0ugh thefeed-pipe 6 in such manner that a small heap of fuel is formed, whichheap is then lighted. The quantities of coal then introduced into thecombustion-chamber come to lie below the burning fire layer, so that thegrating-gases here generated ascend through the glowing coal, becomeheated to the combustion temperature, and then mix with thecombustion-air introduced from underneath through the spaces between theseparate rings 36.

In a combustion-furn ace constructed according to the present inventionthe fuel introduced is heated to such a degree by the burning coal abovethe same that the products of distillation upon passing the burninglayers become completely consumed, whereby a complete and smokelesscombustion of the coal is attained and a simultaneous and almostcomplete utilization of the theoretical calorific value of the fuelhitherto practically impos' sible.

This application is a division of my application filed October 17, 1900,Serial No. 33,389.

What I claim as my invention is- 1. In a smokeless combustion-furnace inwhich the fresh fuel is fed from underneath below the layer of livefuel, the combination with a combustion-chamber, of a pipe openingupward to the combustion-chamber for introducing the fuel into the saidchamber, a conical step-grate consisting of a number of rings andarranged about the feed-pipe, a movable annular plate arranged beneathand extending beyond the conical step-grate, the grate and said annularplate forming the sole of the combustion-chamber, a flue for drawing offthe combustion-gases, and means for forcing the fuel through the saidfeed-pipe, substantially as described.

2. In a smokeless combustion-furnace in which the fresh fuel is fed fromunderneath below the layer of live fuel, the combination with acombustion-chamber, of a pipe opening upward to the combustion-chamberfor introducing the fuel into the said chamber, a conical step-grateconsisting of a number of rings and arranged about the feed-pipe, a

movable annular plate arranged beneath and extending beyond the conicalstep-grate, the grate and said annular plate forming the sole of thecombustion-chamber, a flue for drawing off the combustion-gases,openings in the 'said flue, and means for forcing the fuel through thesaid feedpipe, substantially as described.

3. In a smokeless combustion-furnace in which the fresh fuel is fed fromunderneath below the layer of live fuel, the combination with acombustion-charmher, of a pipe opening upward to the combustion-chamberfor introducing the fuel into said chamber, a conical step-grateconsisting of a number of rings and arranged about the feed-pipe, amovable annular plate arranged beneath and extending beyond the conicalstep-grate, said plate sloping downwardly toward its outer edge, andsaid plate and the conical grate forming the sole of thecombustion-ehamber, a flue for drawing off the combustion-gases, andmeans for forcing the fuel through the feed-pipe,substantially asdescribed.

bustion-chamber, a flue for drawing off the combustion-gases, means forforcing the fuel through said feed-pipe, and means for moving saidannular plate continuously for conducting away the clinkers and ashes,substantially as described.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

ARL VVEGENER.

\Vitnosses:

l VoLDuMAR HAUPI, HENRY HAsrlcn.

